Omega Engineering #M3350/0101 manual Wiring the Network and Connecting the Computer, Introduction

2.Wiring the Network and Connecting the Computer

2.1Introduction

For communication to be established between the personal computer running the CN8- SW software and an Omega controller that supports Omega Plus Protocol (or the original Omega Protocol), the computer and the controller must be connected to the same network. (See 1.2 for hardware and software requirements for the personal computer.)

Communication between a single controller and the CN8-SW computer can be established using an RS-232 interface. This requires:

∙an RS-232 option card in the controller

∙an available serial (COM) port on the PC

∙an adapter to make the correct pin connections for the transmit, receive, and signal ground at the PC serial portÕs D-connector.

Communication between the CN8-SW computer and multiple controllers can be established using an RS-485 interface.6 This requires:

∙an RS-485 option card in the controller

∙an available RS-485 port on the PC, or an available serial (COM) port and an RS-232-to-RS-485 adapter (p/n 223A001U01)

ATTENTION: All wiring should be done by an experienced technician and be installed in accordance with national and local electrical codes. To avoid serious personal injury and damage to equipment, follow all warnings and cautions provided in the controller manuals.

6Up to 32 controllers can be included on an RS-485 network without using a network repeater device. The CN8-SW software can address up to 254 controllers.

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